William Santiago-rivera, MD - Medicare Internal Medicine in Ponce, PR

William Santiago-rivera, MD is a medicare enrolled "Internal Medicine" physician in Ponce, Puerto Rico. He went to University Of Puerto Rico School Of Medicine and graduated in 2001 and has 23 years of diverse experience with area of expertise as Internal Medicine. His current practice location is 909 Ave. Tito Castro, Torre Medica San Lucas, Suite 717, Ponce, Puerto Rico. You can reach out to his office (for appointments etc.) via phone at (787) 841-5549.

William Santiago-rivera is licensed to practice in Puerto Rico (license number 14914) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1669445144.

Contact Information

William Santiago-rivera, MD
909 Ave. Tito Castro, Torre Medica San Lucas, Suite 717,
Ponce, PR 00716
(787) 841-5549
(787) 840-3030

Map and Direction




Physician's Profile

Full NameWilliam Santiago-rivera
GenderMale
SpecialityInternal Medicine
Experience23 Years
Location909 Ave. Tito Castro, Ponce, Puerto Rico
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • William Santiago-rivera attended and graduated from University Of Puerto Rico School Of Medicine in 2001
  NPI Data:
  • NPI Number: 1669445144
  • Provider Enumeration Date: 02/07/2006
  • Last Update Date: 12/27/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 6406815257
  • Enrollment ID: I20041007000057

Medical Identifiers

Medical identifiers for William Santiago-rivera such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1669445144NPI-NPPES
14914OtherPRSTATE LISCENCE

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 14914 (Puerto Rico)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
San Luke's Memorial Hospital IncPonce, PRHospital

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. William Santiago-rivera allows following entities to bill medicare on his behalf.
Entity NameInternal Medicine Perioperative Consultants Psc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1619131406
PECOS PAC ID: 1759443914
Enrollment ID: O20081222000528

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. William Santiago-rivera is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
William Santiago-rivera, MD
Pmb 157, Po Box 780,
Mercedita, PR 00715-0000

Ph: (787) 841-5549
William Santiago-rivera, MD
909 Ave. Tito Castro, Torre Medica San Lucas, Suite 717,
Ponce, PR 00716

Ph: (787) 841-5549

Reviews and Comments


Internal Medicine Doctors in Ponce, PR

Juan Pablo Torres, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 917 Ave Tito Castro, Ponce, PR 00716
Phone: 787-840-4545    
Dr. George Paul Fahed, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 917 Ave Tito Castro, Torre Medica San Lucas Suite 701, Ponce, PR 00716
Phone: 787-290-5577    Fax: 787-848-6644
Dr. Carlos A Gaona Reyes, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1214 Ave Munoz Rivera, Recinto Universitario, Ponce, PR 00717
Phone: 787-284-0383    Fax: 787-987-9310
Rafael Jose Rivera,
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 909 Ave Tito Castro, Torre Medica San Lucassuite 504, Ponce, PR 00716
Phone: 787-651-1432    
Aurelio Garcia Medina, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: Mansion Del Lago Calle 3 # 89, Ponce, PR 00732
Phone: 787-247-2427    
Marian Couto, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2225 Ponce By Pass, Edif Parra Ste 603, Ponce, PR 00717
Phone: 787-492-2000    Fax: 787-813-0517
Mr. Gabriel Martinez-rodriguez, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: San Cristobal Anexo Torre I, Ponce, PR 00780
Phone: 787-848-2100    Fax: 787-813-1836

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.